IC pack connector apparatus with switch means

Abstract: A connector apparatus (10) provides an interconnection between an IC pack (14) and a printed circuit board (16). The apparatus includes a header connector (12) for mounting on the printed circuit board and into which the IC pack is inserted and ejected. A plurality of terminals (24) on the header connector are adapted for interconnection of the IC pack to electrical traces on the printed circuit board. An IC pack ejector mechanism (18) is mounted on the header connector and includes a reciprocally mounted actuator member for effecting ejection of the IC pack from the header connector terminals. An electrical switch (30) is provided on the header connector and is actuatable in response to movement of the actuator member upon insertion or ejection of an IC pack. The switch is interconnected to electrical traces on the printed circuit board.

Description: This invention relates to connector apparatus for providing an interconnection between an IC pack and a printed circuit board through a plurality of terminals, according to the preamble of claim 1. Such an apparatus is disclosed in US-A-5,033,972. The connector apparatus contains a header connector for mounting on a printed circuit board, a plurality of terminals on the header connector adapted for interconnection of the IC pack to electrical traces on the printed circuit board, and an IC pack ejector mechanism mounted on the header connector and including a manual actuating member, a transfer member, and a slider as an ejector member. The manual actuator member has a holding portion for the IC packs which is effective when the IC pack is inserted. A switch is arranged in the pivotional area of the manual actuator means so as to indicate the position thereof. A conventional connector apparatus for an IC pack or memory card includes a generally U-shaped housing having a pair of guide grooves inside a pair of side frame portions, with a connector section joining or extending between the side frame portions. A planar IC pack is inserted into the apparatus within the side guide grooves. A transverse array of socket terminals at an edge of the IC pack electrically interconnect with an associated array of pin terminals on the connector section. Such connector apparatus often are provided as header connectors used for interconnecting the semiconductor circuit of the IC pack to an external circuit such as a main electronic unit. The header connector may be used with an IC pack or memory card for removably coupling the IC pack to a printed circuit board. The IC pack is inserted into the header connector and is extracted therefrom as needed. The extraction force of the IC pack, i.e. the force between the respective terminal pins on the header connector and the respective socket terminals of the IC pack, is relatively high due to the tight fit required to obtain a good electrical interconnection between the terminals. The terminals typically are disposed at a high density which further increases the extraction forces. Often, when an IC pack is to be extracted from a header connector, the card is grasped by a user and simply pulled out. Consequently, a variety of ejecting mechanisms have been incorporated in various connector apparatus, such as the header connectors, for facilitating ejecting an IC pack from a header connector. One of the problems with IC pack connector apparatus of the characters described above, particularly in header connectors employed with printed circuit boards, is that the insertion or extraction of the IC pack into or from the connectors can interfere with ongoing processes or interrupt data transfer, for example, between the IC pack and the main electronic unit. This invention is directed to solving such problems by providing a switch means in the connector apparatus, the switch means being actuated in response to the movement, i.e. the insertion or extraction, of an IC pack with respect to the apparatus. Therefore, the switch means can be used to shut down various processing through the apparatus during insertion or extraction of the IC pack into or from the header connector. The switch means may be incorporated into the ejecting mechanism so that major modifications to standard IC packs and the interfacing of the packs with the connector apparatus do not have to be made. Summary of the Invention An object, therefore, of the invention is to provide a new and improved connector apparatus for providing an interconnection between an IC pack or memory card and an electronic unit, such as a printed circuit board, and including a switch means in the apparatus. The invention is defined in claim 1. The connector apparatus is provided for interconnection between an IC pack and a printed circuit board. The apparatus includes a header connector for mounting on the printed circuit board and into which the IC pack is inserted and from which it is ejected. A plurality of terminals are mounted in the header connector and are adapted for interconnection of the IC pack to electrical traces on the printed circuit board. An IC pack ejector mechanism is mounted on the heater connector and includes a reciprocally mounted actuator for effecting ejection of the IC pack from the header connector terminals. An electrical switch is provided on the header connector in such a manner that the switch is actuable in response to movement of the actuator member within the eject mechanism, which itself is moved by the insertion or ejection of the IC pack. The switch is interconnected to electrical traces on the printed circuit board. The electrical switch is provided by a pair of normally spaced-apart contacts, whereby the contacts are closed in response to ejection of the IC pack from the header connector. The electrical switch is positioned so as to have one of its contacts movably mounted in the path of movement of the actuator member for actuation thereby as the IC pack is extracted from the header connector. That is to say, upon ejection of an IC pack, a portion of the actuator member closes the switch contacts before the IC pack/header connection is broken. Other objects, features and advantages of the invention will be apparent from the following detailed description taken in connection with the accompanying drawings. Brief Description of the Drawings The features of this invention which are believed to be novel are set forth with particularity in the appended claims. The invention, together with its objects and the advantages thereof, may be best understood by reference to the following description taken in conjunction with the accompanying drawings, in which like reference numerals identify like elements in the figures and in which: FIGURE 1 is an exploded perspective view of the connector apparatus of the invention, including a header connector mounted to a printed circuit board, an ejector mechanism and an IC pack; FIGURE 2 is an enlarged perspective view of the header connector mounted to the printed circuit board; FIGURE 3 is a further enlarged perspective view of the switch on the header connector; FIGURE 4 is a perspective view of the closed contacts of the switch removed from the header connector; FIGURE 5 is a top plan view of the switch in its open condition, adjacent the actuator rod of the ejector mechanism; and FIGURE 6 is a view similar to that of Figure 5, with the actuator rod moved to a position of closing the switch. Detailed Description of the Preferred Embodiment Referring to the drawings in greater detail, and first to Figure 1, the invention is embodied in a connector apparatus, generally designated 10, which includes a header connector, generally designated 12, for providing interconnection between an IC pack 14 and a printed circuit board 16. The header connector is adapted for receiving an ejector mechanism, generally designated 18, in the direction of arrow "A". The ejector mechanism receives the IC pack in the direction of arrow "B". Referring to Figure 2 in conjunction with Figure 1, header connector 12 is of a known configuration and includes a dielectric housing 19 defined by a pair of side portions 20 joined by a connector section 22 which mounts a plurality of terminals having pin portions 24 projecting generally parallel to the printed circuit board toward the IC pack between side portions 20. The terminals include tail portions (not shown) connected to circuit traces on the upper surface of printed circuit board 16, as by soldering. Side portions 20 include latch means 26 on the outside thereof for latching interengagement with inside latch means (not shown) of ejector mechanism 18. The side portions also include guide grooves 28 on the inside thereof for guiding IC pack 14 into the header connector, whereby socket terminals (not shown) in forward edge 14a of the IC pack interengage with pin portions 24 of the terminals of the header connector. Lastly, an electrical switch 30 is provided on the header connector at the outside of one of the side portions 20, the right side portion as viewed in the drawings, for purposes to be described hereinafter. Suffice it to say, the electrical switch is actuated in response to ejection of IC pack 14 from header connector 12 with ejector mechanism 18 mounted on the connector. Ejector mechanism 18 is of a known construction in that it includes a generally rectangular frame 32 having one end 32a adapted to receive IC pack 14 and an opposite end 32b adapted to be attached about header connector 12. An ejector lever 34 is pivotally mounted, as at 36, to frame 32. One end of the lever includes an ejector pin 38 for engaging the front edge 14a of IC pack 14 which is inserted into the ejector mechanism. The opposite end of ejector lever 34 is interengaged by a pivot connection 40 to the inner end of an actuator rod 42 having a push button 44 at its outer end. The actuator rod is movably mounted within the frame 32 in a side portion 32c for reciprocal movement therewithin in the direction of double-headed arrow "C". In assembly, header connector 12 is mounted to printed circuit board 16 with the terminals of the connector interconnected to circuit traces on the printed circuit board via soldering. Ejector mechanism 18 may then be assembled to the header connector by interengageably latching thereto. IC packs or memory cards, such as IC pack 14, then can be inserted into and extracted from header connector 12 by using ejector mechanism 18. In operation, when an IC pack is inserted into the header connector, the leading edge 14a of the IC pack engages ejector pin 38 and pivots ejector lever 34 which, in turn, moves actuator rod 42 in the direction of arrow "D" (Fig. 1) so that push button 44 projects outwardly of frame 32. When it is desired to extract the IC pack from the header connector, an operator pushes on button 44 to move actuator rod 42 in a direction opposite the direction of arrow "D". This pivots or rotates ejector lever 34 and causes ejector pin 38 to eject the IC pack by engagement of the pin with the leading edge 14a of the IC pack. The ejector mechanism 18 then is in the position shown in Figure 1 for the reinsertion of the IC pack or the insertion of a new or different IC pack or memory card. Referring to Figures 3 and 4 in conjunction with Figures 1 and 2, electrical switch 30 is provided by a pair of electrical contacts, generally designated 50 and 52. The contacts are stamped and formed of sheet metal material and are mounted in dielectric frame 19 of header connector 12 such that contact portions 50a and 52a of contacts 50 and 52, respectively, are normally spaced-apart. More particularly, contact 50 includes an anchoring portion 50b having barbs 54 (Fig. 4) in its side edges for skiving into the material of dielectric housing 19 within a groove 60 (Fig. 3). This secures contact 50 rigidly within the header connector. Contact 50 further includes a foot portion 50c for soldering to a circuit trace on printed circuit board 16. Contact portion 50a is joined to anchoring portion 50b by a spring arm 50d so that the contact portion is movable in the direction of double-headed arrow "E", but the contact portion is biased toward its normally open position shown in Figures 3 and 4. Contact 52 similarly includes an anchoring portion 52b having barbs 58 (Fig. 4) for skiving into the dielectric material of header connector housing 19, within a groove 60 (Fig. 3) of the housing. Contact 52 also includes a foot portion 52c for soldering to a circuit trace on printed circuit board 16. Contact portion 52a is joined to anchoring portion 52b by a rigid arm 52d. Contact portion 52a is cantilevered downwardly from arm portion 52d and is spaced from contact portion 50a of contact 50 in the normally open condition of the switch. Therefore, contact portion 52a of contact 52 can be considered the fixed contact of switch 30 and contact portion 50a of contact 50 can be considered the movable contact of the switch. Referring to Figures 5 and 6, the location of switch 30 in relation to actuator rod 42 of ejector mechanism 18 (Fig. 1) is illustrated. It also can be seen that the actuator rod has an inwardly projecting boss 62. As stated above, the actuator rod of the ejector mechanism is reciprocally movable in the direction of double-headed arrow "C". It can be seen in Figures 5 and 6 that movable contact portion 50a of contact 50 of electrical switch 30 is located in the path of movement of boss 62 of actuator rod 42. The boss projects inwardly a sufficient distance to cause movable contact portion 50a to engage contact portion 52a of contact 52 for each "stroke" of actuator rod 52, i.e. for each time boss 62 meets the switch. Contact portion 52a is sufficiently resilient to prevent any damage to the switch construction. In essence, it can be understood that the above-described construction of electrical switch 30, along with its location and that of actuation by boss 62 of the movable actuator rod, forms a switch means which is actuated by movement or operation of ejector mechanism 18, i.e. for each movement of actuator rod 42. Therefore, in operation, when an IC pack is inserted into header connector 12, with ejector mechanism 18 in the condition shown in Figure 1, edge 14a of the IC pack will engage ejector pin 38 which will cause ejector lever 34 to pivot about its pivotal mounting 36. This causes actuator rod 42 to move linearly in the direction of arrow "D" shown in Figure 1. Now, referring to Figure 5, this operation effectively results in boss 62 of actuator rod 42 being positioned as shown in Figure 5 whereat electrical switch 30 is in a normally open state. That is, the actuator rod is fully out, and boss 62 is positioned below the electrical switch 30, i.e. not in contact with contact portion 50a. Upon extraction of the IC pack from the header connector, by pushing on push button 44, actuator rod 42 is moved in a direction opposite the direction of arrow "D" (Fig. 1) into engagement with contact 50a. That is, the ejection of the IC pack effectively causes boss 62 of actuator rod 42 to move from the position shown in Figure 5, to the position shown in Figure 6 whereat the electrical switch is actuated (i.e. connecting the electrical circuit through the circuit traces on the printed circuit board interconnected to feet 50c and 52c of the contacts). Therefore, when the push button is actuated to eject the IC pack, the contacts are closed before the IC pack/header connection is broken. Electrical switch 30 can be used for a variety of purposes, including a shut-down of various processes prior to extraction of an IC pack, so that there is no interference with ongoing processes or data transfer which might be effected by the ejection action. Therefore, electrical switch 30 is located in the path of movement of boss 62 of actuator rod 42 so that the system is shut-down or "notified" prior to disengagement of terminal pins 24 from the terminal sockets of the IC pack, and, upon insertion of an IC pack, to open the switch and allow the system to operate and/or transfer data when the terminals have been fully interengaged. Note that depending on the location of the projecting boss along the actuator rod, the switch may be opened or closed either when an IC pack is inserted or when it is ejected. Such a design allows for flexibility depending on the specific application. In addition, by having the switch actuated by a movable member of the ejector mechanism, rather than having the switch directly actuated by the IC pack itself, no modifications to the IC pack or the interface of the conventional header connector need to be made. It will be understood that the invention may be embodied in other specific forms. The present examples and embodiments, therefore, are to be considered in all respects as illustrative and not restrictive, and the invention is not to be limited to the details given herein but only by the appended claims.

Claims: A connector apparatus (10) for providing an interconnection between an IC pack (14) and a printed circuit board (16) through a plurality of terminals (24), comprising: a header connector (12) into which the IC pack (14)is inserted and from which it is ejected, and which includes said terminals (24), an IC pack ejector mechanism (18) mounted on the header connector (12) and adapted to effect disconnection of the IC pack (14) from the header connector (12) including a reciprocally mounted actuator member (42), an ejector lever (34) and a pivot connection (40) between actuator member (42) and ejector lever (34), and an electrical switch (30) adapted to be actuaded in response to movement of the IC pack, and including an actuatable portion located in the path of movement of the actuator member (42) characterized in that said actuator member (42) extends to said header connector (12) and said electrical switch (30) is mounted on said header connector (12) and has a pair of spaced-apart contacts (50, 52), one (50) of said contacts being located in the path of said reciprocating actuator member (42), such that upon ejection of an IC pack, a portion of the actuator member (42) closes the switch contacts (50, 52) before the connection between IC pack and header is broken. The connector apparatus according to claim 1, wherein said spaced-apart contacts (50, 52) are closed in response to movement of the actuator member along a predetermined length within the ejector mechanism (18). The connector apparatus according to claim 2, wherein said portion of the actuator member (42) includes a boss (62) which is adapted to move the one (50) of the pair of spaced-apart contacts (50, 52). The connector apparatus (10) according to any of claims 1 - 3 wherein said ejector mechanism (18), for selectively moving an inserted IC pack (14) from an inserted position to an ejected position, has said pivotally mounted ejector lever (34) engaging the IC pack (14) and effecting movement thereof to the ejected position, and actuator member (42) is slidably mounted for movement in the same general direction as the insertion and ejection of the IC pack.

Inventors: GARDNER MICHAEL J, KACHLIC JERRY DEAN, O'BRIEN PAUL M, GARDNER, MICHAEL J., KACHLIC, JERRY DEAN, O'BRIEN, PAUL M.
Applicants: MOLEX INC, MOLEX INCORPORATED
Application year: 1994
Main classification: H01R23
IPC codes: H01R12, B42D15, H01R13, G06K17